Thermo Scientific 7400 Series, Руководство по эксплуатации и техническому обслуживанию

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3-8 7007400 Cryoplus Thermo Scientific
Section 3
Troubleshooting the Alarms
B
ypass
Sensor
and
O
pen
V
alv
e
warning
lamps
flash
and
the
alarm
bars
light.
The
audible
alarm
sounds.
F
ill
and
B
ypass
valv
es
close.
R
emote
alarm
contacts
set
to
activ
ate
in
30
minutes.
P
rinter
prints
E
rr
or
Code
9.
B
ypass
Sensor
and
O
pen
V
alv
e
warning
lamps
and
the
alarm
bars
light.
A
udible
alarm
sounds.
F
ill
and
B
ypass
valv
es
close.
R
emote
alarm
contacts
activ
ate
immediately
.
F
ill
command
has
been
issued
b
y
the
micr
opr
ocessor
,
but
the
system
senses
a
failur
e
in
the
b
ypass
cir
cuit.
D
ir
t
or
ice
in
the
fill
valv
e.
T
urn
off
the
unit
for
10
to
15
minutes,
then
turn
it
back
on.
If
the
alarm
state
recurs,
call
T
echnical
Ser
vices
D
epar
tment.
If
liquid
nitr
ogen
runs
out
of
the
b
ypass
valv
e,
shut
off
the
LN2
supply
sour
ce,
then
remo
ve
and
refurbish
or
replace
the
fill
valv
e.
9 9
alarm4a.cdr
Level
Sensor
Level
Sensor
Fill
V
alve Fill
V
alve
Bypass
V
alve
Bypass
V
alve
Open
V
alve
Open Valve
Bypass Sensor Bypass Sensor
LN
Source
LN
Source
2
2
Silence
Front
Panel
Alarm
Alarm
Description
and
Probable
Cause
System
Response
Printer
Error
Code
Corrective
Action
The
Alarm
can
only
be
silenced
with
the
key
switch
in
the
Programming
Access
position.
Return
the
key
switch
to
the
Lock
position
after
silence.
Alarms
do
not
ring
back
except
where
noted.
Level
Sensor
Fill
V
alve
Bypass
V
alve
Open V
alve
Bypass Sensor
LN
Source
2
Lev
el
Sensor
warning
lamp
and
the
alarm
bars
light.
The
audible
alarm
sounds.
F
ill
and
B
ypass
valv
es
close.
R
emote
alarm
contacts
set
to
activ
ate
in
30
minutes.
P
rinter
prints
E
rr
or
Code
10.
Lev
el
sensor
or
pr
essur
e
transducer
malfunction.
P
ressur
e
transducer
por
t
in
bottom
of
tank
may
be
clogged
or
blocked.
V
inyl
tubing
to
the
cir
cuit
boar
d
leaks,
may
be
kinked
or
cracked,
or
has
come
off
the
fitting.
If
alarm
persists,
call
T
echnical
Ser
vices
D
epar
tment.
(The
pr
essur
e
transducer
is
not
a
field-ser
vice
item)
Caution!
D
o
NO
T
blo
w
into
the
vinyl
tubing
or
Silence
Silence